CN110564502A - Method for reducing hydrolysis rate of grease by deodorizing nitrogen instead of partial steam - Google Patents
Method for reducing hydrolysis rate of grease by deodorizing nitrogen instead of partial steam Download PDFInfo
- Publication number
- CN110564502A CN110564502A CN201911002716.4A CN201911002716A CN110564502A CN 110564502 A CN110564502 A CN 110564502A CN 201911002716 A CN201911002716 A CN 201911002716A CN 110564502 A CN110564502 A CN 110564502A
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- CN
- China
- Prior art keywords
- grease
- deodorizing
- deodorization
- nitrogen
- hydrolysis rate
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Classifications
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- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11B—PRODUCING, e.g. BY PRESSING RAW MATERIALS OR BY EXTRACTION FROM WASTE MATERIALS, REFINING OR PRESERVING FATS, FATTY SUBSTANCES, e.g. LANOLIN, FATTY OILS OR WAXES; ESSENTIAL OILS; PERFUMES
- C11B3/00—Refining fats or fatty oils
- C11B3/12—Refining fats or fatty oils by distillation
- C11B3/14—Refining fats or fatty oils by distillation with the use of indifferent gases or vapours, e.g. steam
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- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Microbiology (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Fats And Perfumes (AREA)
Abstract
The invention relates to a method for deodorizing by using nitrogen and steam, deodorizing decolored vegetable oil by adopting a two-stage deodorizing process, and deodorizing by using nitrogen to replace partial steam to reduce the hydrolysis rate of the oil. The traditional deodorization process and the two-section deodorization process select steam as stripping gas, contain certain oxygen, the grease can be hydrolyzed and oxidized, and the cost of selecting nitrogen is high. The two-stage deodorization process is adopted, the grease is heated in an upper-stage packed tower under the extreme vacuum condition, and the nitrogen is introduced into the tower to be discharged and the oxygen in the grease is introduced under the condition of relatively low temperature, so that low-boiling-point substances in the grease are removed. The grease is led out of the tower to be heated continuously and then led into a lower section packed tower to be introduced with water vapor to remove high boiling point substances. The method for reducing the hydrolysis rate of the grease by deodorizing the nitrogen instead of part of water vapor can reduce the hydrolysis and oxidation of the grease and the cost of the deodorization process, and provides theoretical guidance for the field of food processing safety.
Description
Technical Field
The invention relates to the field of oil refining, in particular to a method for reducing the hydrolysis rate of vegetable oil by using sectional deodorization.
Background
The vegetable oil is used as edible oil which is important in daily life of people, contains rich nutrient substances and can provide daily required energy for human bodies. Deodorization is often carried out when high-quality oil products are processed, and the deodorization of the oil not only can remove odor components in the oil, improve the smoke point of the oil, improve the flavor of edible oil, but also can effectively improve the safety of the oil.
At present, the main deodorization methods include a conventional steam deodorization process, a nitrogen deodorization process, a steam two-stage deodorization process, and the like. The traditional deodorization process mainly removes non-triglyceride components in the grease by using steam, the heating time of the grease is long under the high-temperature condition, the two-section deodorization process selects the steam as stripping gas, although the retention time of the grease in a high-temperature area is shortened, partial residual oxygen molecules in the steam and the grease still exist, the grease can be hydrolyzed and oxidized, and the cost of all selecting the nitrogen is high.
Disclosure of Invention
The invention adopts a sectional deodorization process, oil is heated in an upper section packed tower under the extreme vacuum condition, and nitrogen is introduced to discharge oxygen in the tower and the oil under the condition of lower relative temperature, so that the hydrolysis and oxidation of the oil are reduced. And (3) after the grease is led out of the tower to be heated continuously, the grease is led into a lower section packed tower to be introduced with steam to be deodorized continuously at high temperature. Nitrogen is respectively utilized to remove low boiling point substances under the condition of low temperature, then steam is introduced under the condition of high temperature, the liquefaction of the steam can be prevented, the contact time of oxygen in the steam and high-temperature grease can be shortened, the cost of a deodorization process is reduced, higher-quality vegetable grease can be obtained, and theoretical guidance is provided for the field of food processing safety.
The specific implementation mode is as follows:
The first embodiment is as follows: introducing a certain amount of decolorized vegetable oil into a double-helix heater, adjusting the temperature to 150-210 deg.C, introducing into the upper packed tower, adjusting deodorization time to 7-13 min, introducing nitrogen gas to 0.2-0.6%, and removing ketone and aldehyde. Extracting oil and fat out of the tower, heating to 230-270 deg.C, introducing oil and fat into the lower packed tower, introducing steam, deodorizing at high temperature for 30-80 min, introducing steam in an amount of 0.2-0.8%, and removing high boiling point fatty acid. And (3) the deodorized vegetable oil flows out from the bottom of the tower, is cooled after being subjected to heat exchange with tower oil by a spiral plate heater to obtain deodorized vegetable oil, and has low hydrolysis rate.
The second embodiment is as follows: the difference between this embodiment and the first embodiment is that the deodorization is performed by adjusting the deodorization temperature of the upper packed column to 160 to 200 ℃, and the other steps are the same as those of the first embodiment.
The third concrete implementation mode: the difference between the present embodiment and the first embodiment is that the deodorization is performed by adjusting the deodorization time of the upper packed tower to 8-12 min, and the other steps are the same as those of the first embodiment.
The fourth concrete implementation mode: the difference between the present embodiment and the first embodiment is that the nitrogen gas introduction amount of the upper packed column is adjusted to 0.1 to 0.5%, and the deodorization is performed, and other steps are the same as those of the first embodiment.
The fifth concrete implementation mode: the difference between this embodiment and the first embodiment is that the deodorization is performed by adjusting the deodorization temperature of the lower packed tower to 230 to 260 ℃, and the other steps are the same as those of the first embodiment.
The sixth specific implementation mode: the difference between this embodiment and the first embodiment is that the deodorization is performed by adjusting the deodorization time of the lower packed tower to 30 to 70 min, and the other steps are the same as those of the first embodiment.
The seventh embodiment: the difference between this embodiment and the first embodiment is that the steam introduction amount of the lower packed column is adjusted to 0.3 to 0.7% to perform deodorization, and the other steps are the same as those of the first embodiment.
Claims (7)
1. The method for reducing the hydrolysis rate of the grease by deodorizing nitrogen instead of part of water vapor is realized by the following steps: the method comprises the following steps: introducing a certain amount of decolorized vegetable oil into a double-helix heater, raising the temperature to 160-200 ℃, and feeding into an upper half section of a packed tower; step two: adjusting deodorization time to 8-12 min; step three: introducing nitrogen in an amount of 0.1-0.5%; step four: leading the deodorized vegetable oil out of the tower, heating to 230-260 deg.c, leading the oil into the lower packed tower, and introducing steam for high temperature deodorization; step five: deodorizing for 30-70 min; step six: the steam quantity is 0.3-0.7%, the influence of different deodorization temperatures, deodorization time and ventilation quantity of the upper and lower sections on the hydrolysis rate of the decolored vegetable oil is inspected, and the optimal conditions of different parameters are determined.
2. The method for reducing the hydrolysis rate of fats and oils by deodorization using nitrogen instead of part of water vapor according to claim 1, wherein the deodorization temperature of the packed tower at the upper stage is controlled at 160, 170, 180, 190, 200 ℃ in the first step.
3. The method for reducing the hydrolysis rate of fats and oils by deodorization with nitrogen instead of part of water vapor according to claim 1, wherein the deodorization time of the upper packed tower in the second step is controlled to be 8, 9, 10, 11, 12 min.
4. The method for reducing the hydrolysis rate of grease by deodorizing with nitrogen instead of part of water vapor according to claim 1, characterized in that the nitrogen aeration rate of the upper packed tower in the third step is controlled to be 0.1, 0.2, 0.3, 0.4, 0.5%.
5. The method for reducing the hydrolysis rate of grease by deodorizing with nitrogen instead of part of water vapor according to claim 1, wherein the deodorizing temperature of the packed tower in the fourth, middle and lower sections is controlled at 220, 230, 240, 250, 260 ℃.
6. the method for reducing the hydrolysis rate of grease by deodorizing with nitrogen instead of partial steam according to claim 1, characterized in that the deodorization time of the packed tower in the middle-lower section of step five is controlled at 30, 40, 50, 60, 70 min.
7. The method for reducing the hydrolysis rate of fats and oils by deodorization with nitrogen instead of part of water vapor according to claim 1, wherein the steam aeration rate of the packed tower in the middle and lower stages of step six is controlled to be 0.3, 0.4, 0.5, 0.6, 0.7%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911002716.4A CN110564502A (en) | 2019-10-21 | 2019-10-21 | Method for reducing hydrolysis rate of grease by deodorizing nitrogen instead of partial steam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911002716.4A CN110564502A (en) | 2019-10-21 | 2019-10-21 | Method for reducing hydrolysis rate of grease by deodorizing nitrogen instead of partial steam |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110564502A true CN110564502A (en) | 2019-12-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911002716.4A Pending CN110564502A (en) | 2019-10-21 | 2019-10-21 | Method for reducing hydrolysis rate of grease by deodorizing nitrogen instead of partial steam |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110564502A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101993779A (en) * | 2010-11-12 | 2011-03-30 | 东北农业大学 | Method for reducing trans fatty acid content in vegetable oil grease by two-stage type deodorization tower |
| CN109486559A (en) * | 2018-11-23 | 2019-03-19 | 东北农业大学 | A kind of method that the saturated vapor deodorization of nitrogen deodorization substitution reduces oil peroxidation value |
-
2019
- 2019-10-21 CN CN201911002716.4A patent/CN110564502A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101993779A (en) * | 2010-11-12 | 2011-03-30 | 东北农业大学 | Method for reducing trans fatty acid content in vegetable oil grease by two-stage type deodorization tower |
| CN109486559A (en) * | 2018-11-23 | 2019-03-19 | 东北农业大学 | A kind of method that the saturated vapor deodorization of nitrogen deodorization substitution reduces oil peroxidation value |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20191213 |